Computer Science Questions
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_____ topology favors use in difficult terrains
__________ cables are used when requirements are low cost, easy installation, no high speed data requirements, short range transmission
______ communication medium has health hazards
how are twisted pair cables connected
_______ topology enables full connectivity
how often are amplifiers required for analog transmission
what is the advantage of shielded over unshielded twisted pair cable
the communication protocol used by the internet is ____
______ topology favors shortest length of cable
The process of streamlining data to minimize redundancy and awkward many-to-many relationships is calledA) normalization.B) data scrubbing.C) data cleansing.D) data defining.
A schematic of the entire database that describes the relationships in a database is called a(n)A) data dictionary.B) intersection relationship diagram.C) entity-relationship diagram.D) data definition diagram.
Which of the following is NOT one of the techniques used in Web mining?A) content miningB) structure miningC) usage miningD) user mining
A one-to-one relationship between two entities is symbolized in a diagram by a line that ends withA) two short marks.B) one short mark.C) a crow's foot.D) a crow's foot topped by a short mark.
________ tools are used to analyze large unstructured data sets, such as e-mail, memos, survey responses, etc., to discover patterns and relationships. A) OLAPB) Text miningC) Web miningD) Web content mining
Data cleansing not only correct errors but alsoA) establishes logical relationships between dataB) structures dataC) normalizes dataD) enforces consistency among different sets of data
The special organizational function whose responsibilities include database design and maintenance, is calledA) data administrationB) database administrationC) information policy administrationD) data auditing
An alternative to using application server software for interfacing between a Web server and back-end databases isA) CGI.B) HTML.C) Java.D) SQL.
In terms of data relationships, associations refers toA) events linked over time.B) patterns that describe a group to which an item belongs.C) occurrences linked to a single event.D) undiscovered groupings.
Data mining is a tool for allowing users toA) quickly compare transaction data gathered over many years.B) find hidden relationships in data.C) obtain online answers to ad hoc questions in a rapid amount of time.D) summarize massive amounts of data into much smaller, traditional reports.
Detecting and correcting data in a database or file that are incorrect, incomplete, improperly formatted, or redundant is calledA) data auditingB) defragmentationC) data scrubbingD) data optimization